Any expression you use must understand date arithmetic and accommodate leap years. Years ago, the expression was much more difficult, but the .xlsx format supports the Excel YEARFRAC() function ...

A research team at KAIST has identified the core gene expression networks regulated by key proteins that fundamentally drive phenomena such as cancer development, metastasis, tissue differentiation ...

That’s not an obvious point when dealing with mathematic functions, but if you look at the first function listed earlier, the following was sufficient to explain everything that was going on: (x) = x ...